Question

If total surface area of a cube is $150c{m}^2$, find the edge.

Answer 1

Given: Total surface area of a cube $=150$ cm$²$
Let $a$ be the side of a cube

Total surface area of a cube $=6a²$

$\Rightarrow 150=6a²$

$\Rightarrow a²=\frac{150}{6}$

$\Rightarrow a²=25$

$\therefore a=5$